// 
// Entify project
//  
// Author:
//       Lauri Taimila <lauri@taimila.com>
// 
// Copyright (c) 2010 Lauri Taimila
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

using System;
using System.IO;

namespace Taimila.Entify
{
	/// <summary>
	/// Provides logging service for Entify framework.
	/// </summary>
 	public static class EntifyLogger
	{
		/// <summary>
		/// If this is false, then all the logging calls are ignored.
		/// </summary>
		private static bool enabled = false;
		
		/// <summary>
		/// Enable logging.
		/// </summary>
		public static void Enable()
		{
			EntifyLogger.enabled = true;
		}
		
		/// <summary>
		/// Disable logging.
		/// </summary>
		public static void Disable()
		{
			EntifyLogger.enabled = false;
		}
		
		/// <summary>
		/// Log filename. All logging entries are written to this file.
		/// </summary>
		public static string LogFilename
		{
			get;
			set;
		}
		
		/// <summary>
		/// Logs specified SQL query.
		/// </summary>
		/// <param name="query">
		/// SQL Query to be logged. <see cref="System.String"/>
		/// </param>
		public static void LogQuery(string query)
		{
			if(EntifyLogger.enabled)
			{
				StreamWriter writer = null;
					
				try
				{
					writer = File.AppendText(EntifyLogger.LogFilename);
				    writer.WriteLine(query + "\n");
					writer.Flush();
				}
				finally
				{
					try
					{
						writer.Close();	
					}
					catch { }
				}
			}
		}
	}
}
